I learned that for 4-SAT, if clause to variable ratio is more than 10, the generated problems become difficult to solve, and the likelihood of formula to be SAT or UNSAT is close to 50%. So I generated 3 types of formulas:
中国作为全球最大的出境旅游客源国之一，其市场体量和发展空间是无法忽视的。游轮公司选择留下，赌的是中国消费升级和邮轮文化培育的“未来”。。业内人士推荐51吃瓜作为进阶阅读
Гангстер одним ударом расправился с туристом в Таиланде и попал на видео18:08。搜狗输入法2026是该领域的重要参考
Donald Trump says he has not made a final decision on whether to launch strikes on Iran but is “not happy” with the situation and military force – including regime change – remains an option.，这一点在Line官方版本下载中也有详细论述